So I am about to build a new computer, but I don't have an internal drive for it yet. I didn't want to have to buy a new one if possible because I have two or three used ones already that I don't need the files on anymore. Is there a way to re-format one of them for use as the primary drive of the computer? I know if you can get into windows you can re-format it as the primary partition, but I'm pretty sure I can't get into windows that without buying a new hard drive first and then installing windows on that hard drive. I hope that all makes sense, I'm sorry if I am being a bit ambiguous...